3x^2-11+15=9

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Solution for 3x^2-11+15=9 equation: 


Simplifying
3x2 + -11 + 15 = 9

Reorder the terms:
-11 + 15 + 3x2 = 9

Combine like terms: -11 + 15 = 4
4 + 3x2 = 9

Solving
4 + 3x2 = 9

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-4' to each side of the equation.
4 + -4 + 3x2 = 9 + -4

Combine like terms: 4 + -4 = 0
0 + 3x2 = 9 + -4
3x2 = 9 + -4

Combine like terms: 9 + -4 = 5
3x2 = 5

Divide each side by '3'.
x2 = 1.666666667

Simplifying
x2 = 1.666666667

Take the square root of each side:
x = {-1.290994449, 1.290994449}

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